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BS EN 62502:2011

BS EN 62502:2011

$189.07

Analysis techniques for dependability. Event tree analysis (ETA)

Published By Publication Date Number of Pages
BSI 2011 48
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IEC 62502:2010 specifies the consolidated basic principles of Event Tree Analysis (ETA) and provides guidance on modelling the consequences of an initiating event as well as analysing these consequences qualitatively and quantitatively in the context of dependability and risk related measures.

PDF Catalog

PDF Pages PDF Title
6 English
CONTENTS
8 INTRODUCTION
9 1 Scope
2 Normative references
3 Terms, definitions, abbreviations and symbols
3.1 Terms and definitions
10 3.2 Abbreviations and symbols
11 4 General description
12 Figures
Figure 1 – Process for development of event trees
13 5 Benefits and limitations of ETA
5.1 Benefits
5.2 Limitations
14 6 Relationship with other analysis techniques
6.1 Combination of ETA and FTA
15 6.2 Layer of protection analysis (LOPA)
6.3 Combination with other techniques
16 7 Development of event trees
7.1 General
7.2 Steps in ETA
20 8 Evaluation
8.1 Preliminary remarks
8.2 Qualitative analysis – Managing dependencies
Figure 2 – Simple graphical representation of an event tree
22 Figure 3 – Functional dependencies in event trees
23 Figure 4 – Modelling of structural or physical dependencies
24 8.3 Quantitative analysis
Figure 5 – Sequence of events
25 Figure 6 – Fault tree linking
26 9 Documentation
28 Annex A (informative) Graphical representation
Figure A.1 – Frequently used graphical representation for event trees
Tables
Table A.1 – Graphical elements
29 Annex B (informative) Examples
30 Figure B.1 – Event tree for a typical fire incident in a diesel generator building
31 Figure B.2 – Simplified event tree for a fire event
Table B.1 – Symbols used in Annex B
33 Figure B.3 – Level-crossing system (LX)
Table B.2 – System overview
35 Figure B.4 – ETA for a level-crossing system
36 Table B.3 – Risk reduction parameters for accidents from Figure B.4
38 Figure B.5 – Simple example
Figure B.6 – Fault tree for the failure of system 1
39 Figure B.7 – Fault tree for the failure of system 2
40 Figure B.8 – Modified event tree
41 Figure B.9 – Event tree with “grouped faults”
43 Bibliography

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BS EN 62502:2011
$189.07